/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.sql.analyzer;
import com.facebook.presto.Session;
import com.facebook.presto.metadata.FunctionRegistry;
import com.facebook.presto.metadata.Metadata;
import com.facebook.presto.security.AccessControl;
import com.facebook.presto.sql.parser.SqlParser;
import com.facebook.presto.sql.rewrite.StatementRewrite;
import com.facebook.presto.sql.tree.Expression;
import com.facebook.presto.sql.tree.FunctionCall;
import com.facebook.presto.sql.tree.Statement;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import java.util.List;
import java.util.Optional;
import static com.facebook.presto.sql.analyzer.SemanticErrorCode.CANNOT_HAVE_AGGREGATIONS_OR_WINDOWS;
import static java.util.Objects.requireNonNull;
public class Analyzer
{
private final Metadata metadata;
private final SqlParser sqlParser;
private final AccessControl accessControl;
private final Session session;
private final Optional<QueryExplainer> queryExplainer;
private final List<Expression> parameters;
public Analyzer(Session session,
Metadata metadata,
SqlParser sqlParser,
AccessControl accessControl,
Optional<QueryExplainer> queryExplainer,
List<Expression> parameters)
{
this.session = requireNonNull(session, "session is null");
this.metadata = requireNonNull(metadata, "metadata is null");
this.sqlParser = requireNonNull(sqlParser, "sqlParser is null");
this.accessControl = requireNonNull(accessControl, "accessControl is null");
this.queryExplainer = requireNonNull(queryExplainer, "query explainer is null");
this.parameters = parameters;
}
public Analysis analyze(Statement statement)
{
return analyze(statement, false);
}
public Analysis analyze(Statement statement, boolean isDescribe)
{
Statement rewrittenStatement = StatementRewrite.rewrite(session, metadata, sqlParser, queryExplainer, statement, parameters, accessControl);
Analysis analysis = new Analysis(rewrittenStatement, parameters, isDescribe);
StatementAnalyzer analyzer = new StatementAnalyzer(analysis, metadata, sqlParser, accessControl, session);
analyzer.analyze(rewrittenStatement, Optional.empty());
return analysis;
}
static void verifyNoAggregatesOrWindowFunctions(FunctionRegistry functionRegistry, Expression predicate, String clause)
{
AggregateExtractor extractor = new AggregateExtractor(functionRegistry);
extractor.process(predicate, null);
WindowFunctionExtractor windowExtractor = new WindowFunctionExtractor();
windowExtractor.process(predicate, null);
List<FunctionCall> found = ImmutableList.copyOf(Iterables.concat(extractor.getAggregates(), windowExtractor.getWindowFunctions()));
if (!found.isEmpty()) {
throw new SemanticException(CANNOT_HAVE_AGGREGATIONS_OR_WINDOWS, predicate, "%s cannot contain aggregations or window functions: %s", clause, found);
}
}
}